JPH0449720A - Switch control system - Google Patents

Abstract

PURPOSE:To perform in-device control which controls a controlled part by directly sending a control signal from its own control part to the controlled part when the control parts 1, 2 receive no packaging state signal either from a switching part or from an opposite control part. CONSTITUTION:When each of the control parts 1, 2 receives no packaging state signal from the switching part 3, namely, when the switching part 3 is unpackaged, the control part 1 or 2 receives no instruction representing which system is an operating system, therefore, the packaging state signal from the opposite control part is confirmed, however, when no packaging state signal is received also from the opposite control part, namely, when the opposite control part is also unpackaged, the control part judges that its own system is the operating system, and controls the controlled part 4 by connecting the control signal from its own control part to the controlled part 4. As a result, when the switching part 3 is unpackaged and furthermore, even when either duplexed control parts 1, 2 is unpackaged, the control part which becomes the operating system can always be instructed, and the control signal is sent, thereby enabling the in-device control to control the controlled part 4 to be performed.

Description

[Detailed Description of the Invention] [Summary] A switching control method in which a controlled unit is controlled by a control signal from either one of the unified control units, and the controlled unit is controlled even if the switching unit is not installed. The purpose of this method is to realize a switching control method that enables internal control of the device, in which an operation instruction signal is sent to one of the control units, and a control signal from that control unit is sent directly to the controlled unit. At the same time, when a failure alarm signal is received from the control unit that is giving the operation instruction signal, a switching unit is provided that mixes the operation instruction signal from the other control unit. Each control section gives a mounting state signal to each other during mounting, and when each control section does not receive the mounting state signal from the switching section, it also does not receive the mounting state signal from the other control section. In some cases, the control signal from the self-control door section is configured to be sent directly to the controlled section.

[Industrial application field]

The present invention relates to a switching control system, and more particularly to a switching control system in which a controlled unit is controlled by a control signal from one of duplicated control units.

In order to improve the reliability of the device as a whole, the control section within the device is duplicated, but this increases the load on the switching section that switches between both control sections, so even if the control section is duplicated, it is difficult to do so. Even if a failure occurs in the switching section, all internal control of the device becomes impossible, resulting in a tremor that causes the system to go down.

For this reason, there is a need for a switching control method that reduces the burden on the switching unit when switching between each redundant control unit to control the controlled unit, and that allows internal control to continue even if some abnormality occurs in the switching unit. has been done.

[Conventional technology]

In the conventional switching control method, each duplicated control unit is instructed by the switching unit to become the active system, and the control signal from the control unit that becomes the active system is switched by the switching circuit in the switching unit. After that, it is connected to the controlled part and controls it.

FIG. 4 is a diagram showing an example of the configuration of a conventional switching control system, where 60 and 70 are duplicated control units, and 50 is a block diagram that takes in a fault alarm signal from each control unit 60 or 70 and gives operation instructions. Generates an operation instruction signal and controls the control unit 60 or 7
4 indicates a switching unit that switches and sends out control signals from 0, and 4 indicates a controlled unit that is controlled by the control signal switched by the switching unit 50.

In the operation of such a switching control system, first, the switching control circuit 51 of the switching unit 50 monitors each failure alarm signal from each control circuit 61 and 71 of the control units 60 and 70, and usually An operation instruction signal is given to one of the predetermined control circuits 61 or 71 to instruct it to become an active system, but when a fault alarm signal is received from either control circuit 61 or 71, a fault alarm is issued. An operation instruction signal is given to the other power control circuit which is not emitting a signal, and a control line from the control circuit to which the operation instruction signal has been given is selected by instructing the switching circuit 52 of the switching unit 50. It is connected to the controlled section 4.

The control circuit 61 or 71 of the control unit 60 or 70 that has received the operation instruction signal sends out a control signal, which is sent to the controlled unit 4 via the control line selected by the switching circuit 52, thereby The unit 4 is controlled within the device.

In addition, each control circuit 61 or 71 of the control unit 60 or 70 is
At startup (tilON), the switching circuit 52 of the switching unit 50 monitors the connection state of its own control signal to the controlled unit 4, determines whether there is a connection, and determines the control procedure for the controlled unit 4. It is configured to generate a failure alarm signal when an abnormal condition such as erroneous control occurs, and to wait for operation instructions only when it is determined that there is no connection.

[Problems to be Solved by the Invention] In such a conventional switching control system, each control circuit in the duplicated control unit is instructed to operate by an operation instruction signal from the switching control circuit in the switching unit, and generates a control signal. However, since it is connected to the controlled part after being switched by the switching circuit in the switching part, the existence value of the switching part becomes large, and the switching part is not mounted (the switching part is not mounted and removed due to breakdowns, repairs, etc.). In such cases, none of the duplicated control units can become the active system, and as a result,
Since no control signal is generated and no control line is connected to the controlled section, there is a problem in that it is impossible to control the controlled section.

Therefore, an object of the present invention is to realize a switching control method that enables internal control of a controlled unit even if the switching unit is not installed.

[! Means to solve problem I]

In the switching control system according to the present invention for achieving the above object, as shown in principle in FIG.
．． 2 and sends a control signal from the control unit directly to the controlled unit 4, and when receiving a failure alarm signal from the control unit that is giving the operation instruction signal,
A switching unit 3 is provided to give an operation instruction signal to the other control unit,
The switching section 3 gives a mounting state signal to each of the control sections 1 and 2 during mounting, and each control section 1.2 gives a mounting state signal to each other during mounting. The control signal from the self-control door section is directly sent to the controlled section 4 when the mounting state signal is not received from the control section of the other party.

Furthermore, when either control unit 1.2 is outputting a mounting status signal to the other party, the control unit receiving the priority activation signal is given priority to send the control signal directly to the controlled unit 4. It also features

[For production]

In the present invention, when controlling a controlled part using a control signal from either one of the duplicated control parts, the connection of the control signal is switched from the conventional method in which the switching circuit in the switching part is used to switch the connection of the control signal. We focused on connecting directly to the controlled part without passing through a circuit.

That is, as shown in principle in FIG. 1, first, the switching unit 3 issues an operation instruction to one of the duplicated control units 1 and 2, instructing it to become the active system. Send a signal. Upon receiving this signal, the control section directly sends a control signal to the controlled section 4 to control the operation and settings of the device, the processing procedure of input/output signals, and the like.

Furthermore, when the switching unit 3 is giving an operation instruction signal to either one of the duplicated control units 1 or 2,
When the control unit monitors the connection status of its own control signal to the controlled unit 4 and receives a fault alarm signal that is issued when an abnormality occurs, it stops sending the operation instruction signal to the control unit and The operation instruction signal is given to the other control unit that is not connected to the control unit 4 (that is, does not issue a fault alarm signal). As a result, one of the control units is always in the active system, and the other control unit is in a state of waiting for an operation instruction from the switching unit 3.

Further, the switching section 3 provides a mounting state signal indicating that the switching section 3 is mounted to each control section 1 and 2 only when the switching section 3 itself is mounted. Further, in this case, each control section 1 or 2 is configured to mutually give a mounting state signal to the other control section only when each control section is mounted.

Therefore, when each control unit 1 or 2 does not receive the implementation status signal from the switching unit 3, that is, when the switching unit 3 is not installed, each control unit 1 or 2 cannot receive an instruction as to whether it is in the active system or not. To do this, we will check the implementation status signal from the other party's control unit, but if we do not receive the implementation status signal from the other party's control unit, that is, if the other party's control unit is also not implemented, we will change the self to the active system. When it is determined that there is a control door, a control signal from the self-control door section is connected to the controlled section 4 to control the controlled section 4.

On the other hand, each control section 1 or 2 mutually receives the mounting state signal from the other control section when the switching section 3 does not receive the mounting state signal, that is, when the switching section 3 is not mounted. Time,
In other words, when dual control units 1 and 2 are both installed, the control unit receiving the priority activation signal becomes the active system with priority.1. A control signal from the self-control door section is connected to the controlled section 4 to control the controlled section 4.

As a result, even if switching unit 3 is not installed, or even if one of the superimposed control units 1 and 2 is not installed, the control unit that will be the active system will always be instructed to send a restraint signal and receive the control unit. In-device control for controlling the control unit 4 can be performed.

〔Example〕

FIG. 2 is a diagram showing an embodiment of the switching control method according to the present invention, in which 10 is a terminal station control device that sends out control commands, and 20 is a terminal station control device that takes in control commands from the terminal station control device 1o and internalizes them. This shows a terminal device that performs control, and is composed of duplicated control sections 1 and 2, a switching section 3, and a controlled section 4, respectively.

The control units 1 and 2 each receive an operation instruction signal that instructs the operation system from the switching unit 3 and the other control unit at startup, and the switching unit 3
Condition judgment circuits 11 and 21 which take in each mounting status signal indicating the presence/absence of implementation of the control unit and the presence/absence of the other control unit and the priority start signal to determine whether or not it is the active system; and the condition judgment circuit 11 and control circuits 12 and 22 that take in basic control commands from the terminal station control device 10 and generate control signals when it is determined that the system is in operation in step 21, and control signals from the control circuits 12 and 22. control signal connection circuits 13 and 2 which transmit the signal to the controlled unit 4 and generate a fault alarm signal when the controlled unit 4 is abnormally controlled.
3 and the terminal station Wt via the pull amplifier resistor RIR2,
When connected to the +5■ system N source in 20 and this control section is not installed, it outputs a "1" level mounting status signal, and when it is installed, it is grounded and r□, level Mounting status signal generators 14 and 24 that output mounting status signals
The switching unit 3 also includes a switching control circuit 51 that takes in a fault alarm signal from the control unit 1 or the control unit 2 and generates a continuous use instruction signal to either of the control units, and a pull amplifier resistor. R3,
When connected to the +5■ system power supply in the terminal device 20 via R4 and the main switching unit 3 is not installed, r 1 ,
and a mounting state signal generating section 32 which outputs a mounting state signal of the label and, when mounted, is grounded and outputs a "0" level mounting state signal.

Further, the controlled section 4 includes a low-speed interface section 41 that receives control signals, a multiplexing/demultiplexing section 42, and a high-speed interface section 43.

Next, the operation in this embodiment will be explained with reference to the control processing flowchart shown in FIG. Note that although the following explanation is about the control section 1, the same applies to the control section 2 as well.

First, at startup (when the power is turned on or when the switch is turned on), the control section 10 condition determination circuit 11 checks the mounting state signal from the mounting state signal generating section 32 of the switching section 3 (step S1 in FIG. 3). ).

As a result, if the mounting status signal is at the "0" level (grounded state) and indicates that the switching unit 3 is mounted, check the presence or absence of the operation instruction signal from the switching control circuit 51 (
Step S2), this switching control circuit 51
．． The system in which there is no failure alarm signal from 2 is designated as the active system, but if both control units 1.2 are normal, one of them is selected in advance and an operation instruction signal is output.

As a result, if the operation instruction signal is received, the control unit 1 itself determines the condition to become the active system, and the control circuit 1
2, the control circuit 12 converts the control command consisting of command information from the terminal station control device 10 into a control signal consisting of executable subdivided control information. The control signal is sent to the control signal connection circuit 13 (step S6).

The control signal connection circuit 13 sends a control signal to the controlled section 4, monitors the connection state of the control signal to the controlled section 4, and when there is an abnormality in the control content, switches the control signal to the switching control circuit 51 of the switching section 3.
A fault alarm signal is generated for the fault (step S7).

Further, when the operation instruction signal is not received from the switching control circuit 51 of the switching unit 3 (step S2 in FIG. 3), the continuous use instruction is not sent from the condition judgment circuit 11 of the control unit 1 to the control circuit 12 and the continuous use instruction is waited. The state becomes (step S3). still,
In this case, an operation instruction signal will always be sent from the switching control circuit 51 to the other control section 2.

Further, the condition determination circuit 11 of the control unit 1 determines that the mounting state signal from the real 2-state signal generation unit 32 of the switching unit 3 is “IJ Relbe (
If the switching section 3 is not mounted (when it is determined that it is not mounted in step S1), the mounting state signal from the mounting state signal generating section 24 of the other control section 2 is checked ( same step S4).

Then, when the mounting state signal is at the "0" level, the other control unit 2
If it is found that the control unit 1 or 2 is installed, it is not known which of the control units 1 and 2 should be operated, so the presence or absence of the priority activation signal is checked (step S5).

If the priority activation signal has been received (S7), the control unit 1 itself is determined to become the active system, and steps S6 and S7 are performed.
is processed in the same way.

Furthermore, if the priority activation signal has not come (step S5)
), the control unit 1 enters a state of waiting for an operation instruction (step 33).

Furthermore, the condition determination circuit 11 of the control unit 1 receives the mounting state signal r.
11 level, that is, when the other control unit 2 is not implemented (step S4), the control unit 1 itself is determined to be the active system regardless of the presence or absence of the priority activation signal, and the same steps as steps S6 and 7 are performed. It is processed.

As a result, I was affected! The control unit 4 takes in a control signal from one of the control units, in this case, the control unit 1, and outputs, for example,
A control instruction such as instructing how to multiplex a plurality of signal lines in the low-speed interface section 41, sending the signal to the multiplexing/demultiplexing section 42, and passing it through the high-speed interface section 43 is executed, and control within the device is completed.

[Effects of the Invention] As explained above, the switching control method according to the present invention achieves 1
, each duplicated control unit determines whether or not it should become the active system by considering the presence or absence of a switching unit, the presence or absence of the other control unit, and the conditions for priority start-up, and In this case, the configuration is configured so that a control signal is sent directly to the controlled part, so even if the switching part is not installed or the other control part is not installed, it is possible to perform internal control to control the controlled part. A control method will be realized.

Therefore, the existence value occupied by the switching section can be reduced, and the reliability of the entire control function can be increased.

[Brief explanation of the drawing]

Fig. 1 is a block diagram explaining the principle of the switching control method according to the present invention, Fig. 2 is a diagram showing an embodiment of the switching control method according to the present invention, and Fig. 3 is an embodiment of the present invention. FIG. 4 is a block diagram showing a conventional example. In FIG. 1, 1.2...Control unit, 3...Switching unit, 4...Controlled unit. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In a switching control method in which the controlled unit (4) is controlled by a control signal from either of the duplicated control units (1) or (2), either of the control units (1) or (2) When the controller sends an operation instruction signal to the control unit (4) and directly sends the control signal from the control unit to the controlled unit (4), and receives a failure alarm signal from the control unit that is giving the operation instruction signal, A switching unit (3) is provided that provides an operation instruction signal to the control unit, and the switching unit (3) provides a mounting status signal to each control unit (1) (2) during mounting, and provides a mounting state signal to each control unit (1) (2). give mounting status signals to each other during mounting, and each control section (1) (2) is connected to the switching section (3).
Switching characterized in that when the mounting state signal is not received from the other control section, the control signal from the own control section is directly sent to the controlled section (4) when the mounting state signal is not received from the other control section. control method. (2) When either control unit (1) or (2) is outputting a mounting status signal to the other side, the control unit receiving the priority activation signal gives priority to sending the control signal to the controlled unit (4). 2. The switching control system according to claim 1, wherein the switching control system directly sends the signal to the user.